Mitsubishi Denki Kabushiki Kaisha

Kazu Matsunaga

Kenzo Awazu, Deceased

Hiroshi Okuda

Noritsuna Hashimoto

Kenzo Awazu

A phosphor for a chathode ray tube obtained by firing a tervalent europium-activated yttrium oxide of the formula Y.sub.2 O.sub.3 :Eu containing at least one member selected from the group consisting of barium fluoride and magnesium fluoride.

Phosphor for cathode ray tube

A phosphor excellent in its temperature-versus-luminance characteristics, which is represented by the following formula:

Phosphor

A phosphor having a matrix formulation of Li(Al,Ga)O.sub.2 having an atomic ratio of Al to Ga ranging from 75:25 to 5:95, wherein 0.3 to 1.3 atomic percent of Fe.sup.3+ ions are additionally incorporated in the matrix as an active component and Li is present in substantially a 1:1 stoichiometric ratio to the total of Al, Ga and Fe. The phosphor so produced is superior to previously disclosed phosphors when used in an optical code reader to read codes from colored paper.

Growing community of inventors

Amagasaki, Japan

Kazu Matsunaga